Oh wait, I didn't take a close enough look... I was assuming that this check guarded an `ApplyRelativePositioning(` call, but it doesn't. I don't recall precisely what that check was for (or what breaks if we remove it). Maybe we should try deleting it and seeing what breaks, and then try to create `position:sticky` versions of those testcases? :)
Bug 1758020 Comment 2 Edit History
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Oh wait, I didn't take a close enough look... I was assuming that this check guarded an `ApplyRelativePositioning(` call, but it doesn't. I don't recall precisely what that check was for (or what breaks if we remove it). Maybe we should try deleting it and seeing what breaks, and then (assuming something breaks), try to create `position:sticky` versions of those testcases, which would serve as testcases for this bug here & would potentially be fixed if we broadened the check? (if that is indeed the right thing to do)